package cn.stylefeng.guns.modular.util;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.ObsBucket;
import com.obs.services.model.PutObjectRequest;
import com.obs.services.model.PutObjectResult;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.UUID;

public class QRCodeUtil {

    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

    private QRCodeUtil() {
    }

    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
            }
        }
        return image;
    }

    public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, file)) {
            throw new IOException("Could not write an image of format " + format + " to " + file);
        }

    }

    public static void writeToStream(BitMatrix matrix, String format, OutputStream stream) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        if (!ImageIO.write(image, format, stream)) {
            throw new IOException("Could not write an image of format " + format);
        }
    }

    /* 初始化OBS客户端所需的参数 */
    static final String endPoint = "obs.cn-east-2.myhuaweicloud.com/";
    static final String ak = "VNMEP2VHLKXLYHZP9RUF";
    static final String sk = "TcYrnYvarEzcouMUxU3UfJCTY6JeMyEPCOjUPGMW";
    static final String g_bucketName = "";
    static final String g_bucketLoc = "cn-south-1";

    public static void main(String[] args) throws WriterException, IOException {


        String text = "hello！"; // 二维码内容
        int width = 600; // 二维码图片宽度
        int height = 600; // 二维码图片高度
        String format = "jpg";// 二维码的图片格式

        Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");    // 内容所使用字符集编码

        BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, hints);
        // 生成二维码

        File outputFile = new File(System.getProperty("user.dir") + File.separator + "qrcode.jpg");
        writeToFile(bitMatrix, format, outputFile);

        /* 创建OBS客户端 */
        ObsClient obsClient = new ObsClient(ak, sk, endPoint);


        PutObjectRequest request = new PutObjectRequest("wbs-bucket", "objectkey");

        final String keySuffixWithSlash = "device-qrcode/";
        PutObjectResult putObjectResult = obsClient.putObject("wbs-bucket", keySuffixWithSlash + UUID.randomUUID(), outputFile);
        String objectUrl = putObjectResult.getObjectUrl();

    }


}
